<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./1.css">
</head>
<body>
    <div class="container">
        <div class="header">头部</div>
        <div class="nav">导航</div>
        <div class="content">
            <div class="left">主要内容</div>
            <div class="right">右侧模块</div>
        </div>
        <div class="footer">底部</div>
    </div>
</body>
</html>